Package library as @moduletrace/twui npm package

- Move components/ to src/ and compile to dist/ with tsc
- Add root barrel export plus deep-import subpath exports and base.css export
- Post-compile step: copy base.css, add .js import extensions, mark client modules
- Add publish.sh and .npmrc for the Gitea npm registry
- Fix type errors, guard TinyMCE env access, drop ace-builds type dependency
- Rename clashing props type names, remove Next.js scaffolding and unused deps

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/elements/Popover.tsx

@@ -0,0 +1,8 @@
+import Modal, { type TWUI_MODAL_PROPS } from "./Modal";
+
+/**
+ * # Popover Component
+ */
+export default function Popover(props: TWUI_MODAL_PROPS) {
+    return <Modal {...props} isPopover />;
+}